I. |invə|lüshən ə l, -shnəl also -vəl|yü- adjective
Etymology: involution + -al
1. : of or relating to involutional melancholia
involutional depression
2. : of or relating to the climacterium and its associated bodily and psychic changes
mental hygiene in the involutional time of life
II. noun
( -s )
: one that suffers from involutional melancholia